Is Formaldehyde in Vapes? Do Juul Pods Contain Formaldehyde FDA rescinds marketing ban on Juul vaping products DYK? Vaping coats lungs with potentially harmful chemicals. This can include chemicals such as: Diacetyl: This food additive, used to deepen e cigarette flavors, is known to damage small passageways in the lungs. Clinical Studies Juul Labs Science Do Juul Pods Contain Formaldehyde FDA orders Juul e cigarettes off the market over safety concerns